نتایج جستجو برای: adjustable boundary layer

تعداد نتایج: 429956  

منوچهر حیدرپور, , حسین افضلی مهر, , سید حسین فرشی, ,

Suitable stable channel design and optimization of river geometry can reduce cost of projects. The regime theory provides the possibility of empirical and semi-empirical investigations of stable channel design in which erosion and sediment transport are in equilibrium. The objective of this research is an investigation and a comparison of the influence of uniform and non-uniform flows on the pr...

Ali Shateri Payman Elyasi,

Laminar boundary layer flow and heat transfer of Newtonian nanofluid over a stretching sheet with the sheet velocity distribution of the form (UW=cXβ) and the wall temperature distribution of the form (TW=T∞+aXr ) for the steady magnetohydrodynamic (MHD) is studied numerically. The governing momentum and energy equations are transformed to the local non-similarity equations using the appropriat...

A. R. Shateri P. Elyasi

Laminar boundary layer flow and heat transfer of Newtonian nanofluid over a stretching sheet with the sheet velocity distribution of the form (Uw=CXβ) and the wall temperature distribution of the form (Tw= T∞+ axr) for the steady magnetohydrodynamic(MHD) is studied numerically. The governing momentum and energy equations are transformed to the local non-similarity equations using the appropriat...

Journal: :journal of mathematical modeling 2015
jugal mohapatra manas kumar mahalik

in this paper an exponentially fitted finite difference method is presented for solving singularly perturbed two-point boundary value problems with the boundary layer. a fitting factor is introduced and the model equation is discretized by a finite difference scheme on an uniform mesh. thomas algorithm is used to solve the tri-diagonal system. the stability of the algorithm is investigated. it ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده مهندسی مکانیک 1387

در تحقیق حاضر اثر مکش بر پایداری جریان عبوری حول یک ایرفویل بررسی شده است. هدف کلی از این تحقیق دست یابی به جریانی آرام حول ایرفویل می باشد. برای این کار اعمال مکش بر جریان با هدف به تاخیر انداختن محل گذار جریان از رژیم آرام به مغشوش و همچنین بیشینه کردن پارامتر نسبت لیفت به درگ صورت گرفته است. بدین ترتیب، جهت انجام این فرآیند نیاز به حل دقیق جریان و تعیین نقطه گذار جریان می باشد. ابزار استفاده...

2005
Zhichao Zhang Feng Liu David M. Schuster

This paper presents an Euler and boundary-layer method capable of unsteady flow and aeroelastic simulations. An integral boundary-layer solver is coupled with an Euler solver in a “semi-inverse” manner. For the inviscid part, approximate wall boundaryconditions are implemented on non-moving mean chord positions, whereas the full nonlinear Euler equation is solved in the field for accurate resol...

افضلی مهر, حسین ,

Over the past decades, numerous regime formulations, describing channel width, average flow depth and channel slope, have been proposed for gravel-bed rivers. Using the downstream hydraulic geometry measurements from 280 field channels, nine gravel-bed predictive formulations were compared. They are attributed to Bray, Chang, Hey and Thorne, Kellerhals, Neil, Parker and Simons, and Albertson. T...

H. R. Momeni and N. Sadati, M. Jafarboland,

Designing a robust tracking control for a non-linear MIMO system with uncertainty is one of the most complicated control problems. In this paper, sliding mode changed to non-linear controllable canonical form by input-output linearization. This, sliding surfaces can be defined in a way that we can de-couple equations and indicate the sliding conditions of multi-variable controller system. The u...

ژورنال: :فیزیک زمین و فضا 2013
نفیسه پگاه فر عباسعلی علی اکبری بیدختی پیمان زواررضا

mixing height of the atmospheric boundary depends on the vertical variation of temperature in the atmosphere which includes temperature inversion (including surface and elevated inversions) that has a significant effect on air quality. the mixing height like some other meteorological variables has diurnal variations. the reason for that is its dependence on some other basic meteorological param...

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